commit ad4110ba71b0d995ca57d6b9498658037c9ee00a
Author: Joel Pittet <joel@pittet.ca>
Date:   Sun Feb 2 00:46:15 2014 -0800

    remove

diff --git a/core/includes/form.inc b/core/includes/form.inc
index f941efb..5d4a943 100644
--- a/core/includes/form.inc
+++ b/core/includes/form.inc
@@ -2177,7 +2177,7 @@ function form_process_autocomplete($element, &$form_state) {
  */
 function template_preprocess_input(&$variables) {
   $element = $variables['element'];
-  $variables['attributes'] = $element['#attributes'];
+  $variables['attributes'] = new Attribute($element['#attributes']);
 }
 
 /**